You can delete an expression to stop it from controlling attributes. 
	 
To delete an expression
- Navigate to 
		  Windows > Animation Editors > 
		   
		  Expression Editor. 
		  
 
		
 
- Select it in the 
		  Expression Editor. 
		
 
- Click 
		  Delete. 
		  
Tip: You can quickly delete 
			 all non-particle expressions from a scene. From Maya’s main menu bar, select 
			 .